Knob attachment



(No Model.) l

- O. STODDARD.

KNOB ATTACHMENT. Y

No. 296,482. Patented Apr. 8, 1884.

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Unirse STATES faretti @einen OSCAR STODDARD, OF DETROIT, MICHIGAN.

KNOB ATTACHMENT.

SPECIFICATION forming part of Letters Patent No. 296,118.2, dated April 8, 1884.

(No model.)

To all whom t may concern:

Be it known that I, OSCAR STODDARD, a citizen of the United States, residing at Detroit, in the county of Wayne and State of Michigan, have invented a certain newand useful Improvement in Self -Attaching Door -Knobs 5 and I do hercbydeclare the following to be a clear and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the several drawings forming a part of this specification, in which" Figure l is a perspective of my invention attached to a door, being part in section. Fig. 2 is a face view of the knob B and cross-section of the attaching parts. Fig. 3 is an inverted perspective of the locking-key, showing its serrated surface E. Fig. 4 is a section of the latch-bolt A, showing `its serrated surface A.

The object of my present invention is to so construct the attaching parts of a door-knob and spindle that they may be readily and properly secured to a door without the aid of tools, that may be readily removed, and that will be cheap to construct and durable.

In the drawings, Fig. 1 D represents the common rose-plates; B, the knobs; C, the neck of the knobs; E, the locking-key iitting within a recess cut within the neck of the knob. e is the curved or hooked end of the locking-key; A, the knob-spindle, which is provided with a serrated surface, A', at its end portions. The neck G of the knob has a square opening extending through the center. This opening is sufficiently large to allow the spindle A to slide freely within it.

In the upper surface of the neck G, I provide a slot. (See Figs. 1 and 2.) This slot forms a seat for the tapering locking-key E, having an inclined upper surface, being suiiiciently large to allow the key E to lie within it, and bring the lower serrated surface, E', parallel with the serrated surface A of the spindle, as shown in Fig. 1. The outer end, a., of the locking-key E is about one-third thicker than at its opposite end, the slant being upon its upper surface. (See Figs. 1 and 3.) The key is inserted within the neck C of the knob, with its thicker end a toward the knob B, (see Fig. 1,) with the hooked end e fitting within the mouth of the neck C, terininatin g under the ange of the rose-plate D. To attach thc parts I pass the spindle A ,through the door androse-plates D D, inserting thelocking-keyE within the recess formed within the neck C of the knob, having its thicker end a. toward the knob, and when the key is forcedin its fulllengthitleaves a square hole through the neck j ust large enough to allow the spindle A to slide freely within said neck when forcing the knob toward the door to the position of dotted line of Fig. 1.

It will be observed that as the hooked end e of the key engages with the inner end of the neck C of the knob, forcing the neck over the spindle causes the key to slide upon the serrated surface of the spindle A. until its curved ende meets the rose-plate D, when, drawing suddenly back upon the knob, the neck is caused to slip or slide over the keyE and spindle A from the dotted position to the proper position of Fig. 1. As the neck of the knob is forced over the spindle A,thc serrated surface of the key E fits within the serrated portion of thespi11dle,andis preventedfrommoving as the knob is drawn back when locking the parts, as specified, and as the thicker end a of the key E is outward and lies within a tapering channel, the sliding of the neck C over the key and spindle causes the narrow or shallow' portion of the key-seat to crowd upon the incline of the key, thus forcing the key down upon the spindle A, thus preventing the neck ofthe knob from pulling off of the spindle. To remove the knob from the spindle the knob is slightly tapped or driven toward the door to the dotted positionlof Fig. 1, when the neck C of the knob will slide down the incline of the key E, freeing said key from' the spindleA. Then by inserting a pointed instrument just within the ange of the rose-plate D down under the hooked end c of the locking-keyE, and then lifting it up and pulling from the door on the knob B,the parts Awill become disengaged.

It is obvious that by this arrangement I dispense with drilling holesinto thek spindle, and also the employment of set-screws, as are now in common use. It will also be observed that by this' arrangement the harder you pull outward upon the knob the tighter the parts be- ICO come, and that the tapering key gives a long bearing upon the spindle7 and will not allow the knob to rattle or Work loose. The Channel formed Within the knob shank or neek is inclined on itsupper surface7 conforming to the incline of the looking-key7 being sufoently deep to receive the key, thus bringing the lower or under surface of the key parallelwith the upper surface of the spindle. The inner end of the key is bent at a right angle to the under surface of the body of the key, having its eXtreme end again bent backlWard over the body of the key, thus forming the hooked end e. The hooked portion e, when the parts are properly attached to a door, lies Within a vertical channel formedin the end of the knob shank or neck,l leaving OSCAR STODDARD.

Vitnesses:

R. B. WHEELER, JNo. G. DoYLE.. 

